Lanxi Underground River lies in Liudongshan scenic spot, six kilometers east of Lanxi City, SE China's Zhejiang Province. The travel route in the scenic spot is about 2.5 kilometers, covering an area of 25,000 square meters.

The Underground River scenic spot consists of three sections, namely Yongxuedong (Gushing Snow Cave), Shijiansuidao (The Time Tunnel) and Yuludong (The Jade Dew Cave). The river is more than one kilometer long; with crystal water running all the year round. Tourists may visit the place either by boat or on foot. The temperature in the cave always keeps around 18 degrees Celsius, making it warm in winter and cool in summer.